126531101 has 2 divisors, whose sum is σ = 126531102. Its totient is φ = 126531100.

The previous prime is 126531079. The next prime is 126531113. The reversal of 126531101 is 101135621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108264025 + 18267076 = 10405^2 + 4274^2 .

It is a cyclic number.

It is not a de Polignac number, because 126531101 - 2⁶ = 126531037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126531161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63265550 + 63265551.

It is an arithmetic number, because the mean of its divisors is an integer number (63265551).

Almost surely, 2^126531101 is an apocalyptic number.

It is an amenable number.

126531101 is a deficient number, since it is larger than the sum of its proper divisors (1).

126531101 is an equidigital number, since it uses as much as digits as its factorization.

126531101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 126531101 is about 11248.6044023248. The cubic root of 126531101 is about 502.0331890778.

Adding to 126531101 its reverse (101135621), we get a palindrome (227666722).

The spelling of 126531101 in words is "one hundred twenty-six million, five hundred thirty-one thousand, one hundred one".